Rope-cutter



(No Model.) V

L. D. SHRYOOK.

ROPE CUTTER. v N0 541,018. Patented June 11, 1895.

Jag 1. M V

M My" W I bier/14121 4 V Unitas STATE TENT Price.

LEONARD D. SHRYOCK, OF MARIETTA, OHIO.

ROPE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 541,018, dated June 11,1895.

Application filed November 21, 1894. Serial No. 529.494- (No model.)

To all whom it may concern.-

Be it known that I, LEONARD D. SHRYOCK, of Marietta, inthe county of\Vashington and State of Ohio, have invented certain new and usefulImprovements in Rope-Cutters; and I do hereby declare the following tobe a full,

cutter; and the object of the same is to provide an effective device forsevering the ropes of well boring tools close to the socket when thetools have become lodged in the bore.

Prior to my invention devices have been I provided for cutting the ropeat or near its upper end leaving the greater portion thereof in the wellto add to the obstruction caused by the tools, and my aim is to overcomethe objectipn by providing the device aforesaid, which is fullyillustrated in the accompanying drawings, in which" Figure 1 is aperspective view of the device. Fig. 2 is an elevation partly insection, showing the same'in position over a rope, with the knife sprungdown through the medium of the rope-socket. of the reverse side of thelower portion of the device illustrated in Fig. 2.

A designates astem secured in the usual manner to the line, and arrangedat one side of the lower end'of the steinis the curved frame 0 slottedat its outer side as shown at D. The lower extremity thereof is reducedtransversely as indicated at E and pivotally secured thereon is thecurved knife F, the same being beveled upon its upper side to form thecutting edge upon its concave surface as shown. Secured at one end tothe inner wall of the frame 0 is the spring G having its free lower endcurved at H and arranged between the curved portion and the said innerwall of the frame is the coiled spring I. The slot D permits the springG to moveoutward or laterally for the'purpose presently to be stated.Carried bythe inner side of the said spring is a lug K which is adaptedto support the curved knife normally in a horizontal position asindicated in Fig. 1.

Upon the inner edge of frame 0 is formed Fig. 3 is a sectional view thevertical passage L having shoulder Mat its upper end and movable throughthis passage is rod N carrying between its ends the shoulder 0, andencircling the rod between said shoulders M and O is the coiled spring Pwhich serves to press said rod normally downward, and the same bearingagainst the upper side of the knife exerts a pressure thereon at alltimes when the knife is in a horizontal position, so that when the sameis released by an outward movement of spring G it will be forceddownward to an inclined position by said rod.

In operation when the tools have become stuck in the bore the knifecutting device is threaded upon the rope and the same is let down intothe well with therope extended through the curved portion of the frameand the knife as indicated in Fig. 2. The downward movement is continueduntil the rope socket Q is reached which serves to press outward thefree end of spring G releasing the curved knife in the manner beforedescribed,

permitting it to assume the position indicated in Fig. 2 so that byanupward pull upon the knife supporting line the tool rope will be severedin a diagonal line at a point adjacent to the socket as will be readilyunderstood.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a rope cutter, a vertically movable support, knife F encirclingthe rope and pivoted to the support, and a trippable support for holdingthe knife from engagement with the rope, substantially as shown anddescribed.

2. In a rope cutter, a vertically movable support, a knife embracingtherope and pivoted to swing vertically on the support, and a trippablesupport for holding the knife raised from a cutting position,substantially as shown and described.

3. In a rope cutter, a vertically movable support, a curved knifesharpened upon its concave edge and pivoted to swing vertically on thesupport, said knife being adapted to embrace the rope, and a trippablesupport for the free portion of the knife for holding it raised fromengagement with the rope, substantially as shown and described.

4. .A rope cutter comprising a frame, a

swinging rope embracing knife, spring G secured at one end to the frameand adapted to engage the free edge of the swinging knife for thepurpose stated, and the free end of said spring curved inward at H toengage the rope socket, substantially as shown and described.

5. An improved rope cutter comprising a frame, a swinging rope embracingknife therein, the frame being provided with slot D, spring G adapted tobe extended outward into said slot, the lug on the spring forsupportingthe free edge of the knife, the inward bend at the lower end of thespring G for the purpose stated, and the coiled spring arranged betweensaid free end and the frame, substantially as shown and described.

An improved rope cutter comprising the stem reduced at its lower end,the curved knife pivoted to said reduced portion, the curved frame 0 atthe lower end of the stem, and the outwardly movable spring support Gfor engaging and holding the free edge of the knife, substantially asshown and described.

7. An improved rope cutter comprising the frame having a verticalpassage formed therein, a swinging rope embracing knife in the frame, ameans for supporting the free edge of the knife for the purpose stated,and the spring-depressed rod in the vertical passage for hearingconstantly upon the knife, substantially as shown and described.

8. Animproved rope cutter comprisinga frame having a vertical passageprovided with a shoulder at its upper end, a rod movable in the passagewith the shoulder between its ends, and a coiled spring on the rodbetween said shoulders, the swinging rope cm bracing knife upon whichthe said spring actuated rod exerts a constant pressure, and a devicefor supporting the knife out of engagement with the rope, substantiallyas shown and described.

9. An improved rope cutter comprisinga knife and a device for holdingthesame from engagement from the rope, and a spring for forcing theknife to the rope and there holding it when the knife is disengaged fromsaid holding device, substantially as shown and described.

In testimony whereof I aiiix my'signature in presence of two witnesses.

LEONARD D. SIIRYOCK.

\Vitnesses:

W. H. GooDwIN, J. W. HOLDEN.

